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Finding the Fourth Proportional to 285,816.67, 428,725.16 and 72,600.58

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Solution

The fourth proportional to 285,816.67, 428,725.16 and 72,600.58 is: 108,900.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,816.67 : 428,725.16 = 72,600.58 : x
  2. Step 2: Convert to fraction form
    285,816.67/428,725.16 = 72,600.58/x
  3. Step 3: Cross multiply
    285,816.67x = 428,725.16 × 72,600.58
  4. Step 4: Simplify right side
    285,816.67x = 31,125,695,276.59
  5. Step 5: Solve for x
    x = 31,125,695,276.59/285,816.67
  6. Step 6: Final answer
    x = 108,900.91

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.